I have table name "tmp1" which has fields name id and comma. comma contains 1,3,2,4,5 values with text datatype.
I want separate value in loop in my stored procedure. Like 1 then 3 then 2 etc. So, I was create below given procedure.
BEGIN
DECLARE my_delimiter CHAR(1);
DECLARE split_comma text;
DECLARE done INT;
DECLARE occurance INT;
DECLARE i INT;
DECLARE id INT;
DECLARE sel_query VARCHAR(500);
DECLARE splitter_cur CURSOR FOR SELECT id,comma from tmp1;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;
OPEN splitter_cur;
splitter_loop:LOOP
FETCH splitter_cur INTO id,split_comma;
SET occurance = LENGTH(split_comma) - LENGTH(REPLACE(split_comma,',',''))+1;
SET my_delimiter=',';
IF done = 1 THEN
LEAVE splitter_loop;
END IF;
IF occurance > 0 THEN
SET i = 1;
WHILE i <= occurance DO
SET sel_query = "SELECT SUBSTRING_INDEX(comma,',',i) as abc from tmp1";
SET #sel_query = sel_query;
PREPARE sel_query FROM #sel_query;
EXECUTE sel_query;
SET i = i + 1;
END WHILE;
END IF;
SET occurance = 0;
END LOOP;
CLOSE splitter_cur;
END;
But when I execute this procedure error occurs "MySQL said: #1054 - Unknown column 'i' in 'field list'"
But here i is a variable used to rotate loop.
Is there any solution? Please help me ... Thank you in advance ...
You have to embed value of variable i in the query, which you did not do.
Change:
SET sel_query = "SELECT SUBSTRING_INDEX(comma,',',i) as abc from tmp1";
SET #sel_query = sel_query;
To:
SET #sel_query = CONCAT( "SELECT SUBSTRING_INDEX(comma,',',", i, ") as abc from tmp1 )";
Related
I try to set a trigger before I insert a value into table ec3_checking, the trigger's function is set 'account_id' to 'CH-n' if the highest value for id_count is (n-1), id_count is an auto_increment parameter.
delimiter //
CREATE TRIGGER account_id_add BEFORE INSERT ON `ec3_checking`
FOR EACH ROW
BEGIN
DECLARE anum int;
DECLARE bnum int;
SET bnum = max(id_account);
SET anum = bnum + 1;
SET NEW.account_id = concat('CH-', anum);
END//
Then I try to insert some values into the table
insert into `ec3_checking` (balance, overdraft_limit)
VALUES
('300','50');
There is an error:1111, invalid use of group function, could anyone help me?
Thank you very much.
CREATE TRIGGER `account_id_add` BEFORE INSERT ON `ec3_checking`
FOR EACH ROW BEGIN
DECLARE anum int;
SET #bnum = (SELECT max(id_account) FROM ec3_checking);
SET anum = #bnum + 1;
SET NEW.account_name = concat('CH-', anum);
END
I've the following code in a stored procedure:
DECLARE done INT DEFAULT FALSE;
declare v_degree int(11);
declare v_start_age smallint(6);
declare v_end_age smallint(6);
declare v_gender varchar(20);
declare v_calctable varchar(200);
SELECT calculationtable into v_calctable FROM wac.degrees where tablename = concat("cdb_" + arg_tablename);
declare cur CURSOR for select degree, start_age, end_age, belt, gender from v_calctable;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
Like this I'll get a syntax error in the line "SELECT calculationtable into v_calctable FROM wac.degrees where tablename = concat("cdb_" + arg_tablename);"
If I put it after the "Declare cursor" there's no syntax error, but I need the result to be used on de Cursor select statement.
How can I accomplish this?
Thanks.
CREATE DEFINER=`root`#`localhost` PROCEDURE `my_procedure`()
BEGIN
DECLARE done INT DEFAULT FALSE;
declare v_degree int(11);
declare v_start_age smallint(6);
declare v_end_age smallint(6);
declare v_gender varchar(20);
declare v_calctable varchar(200);
SELECT calculationtable into v_calctable FROM wac.degrees where tablename = concat("cdb_" + arg_tablename);
begin -- write here begin keyword
declare cur CURSOR for select degree, start_age, end_age, belt, gender from v_calctable;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
end; -- end here inner block
END
when you use inner block by another begin and end keyword
then it have no syntask error .
but this procedure give you correct result or not i am not clear
I have created the following stored proc in MySQL:
BEGIN
DECLARE temp_mold VARCHAR(30);
DECLARE temp_time DATETIME;
DECLARE temp_shot_ct INT;
DECLARE temp_shot_count INT;
DECLARE temp_shot_mold VARCHAR(30);
DECLARE temp_shot_cavity_count INT;
DECLARE temp_job_count INT;
DECLARE temp_row_count INT;
DECLARE done INT DEFAULT 0;
DECLARE temp_shot_counter INT DEFAULT 1;
DECLARE setup_time INT;
DECLARE cursor1 CURSOR FOR
SELECT
(schedule_run_time*3600)/(schedule_qty/schedule_cavity_count) as shot_ct,
ROUND((schedule_qty/schedule_cavity_count)) as shot_count,
schedule_mold as shot_mold, schedule_cavity_count as shot_cavity_count
FROM `schedule`
WHERE `schedule`.schedule_cell = start_cell AND `schedule`.schedule_date = DATE(start_time) AND deleted = 0
ORDER BY schedule_order ASC;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
SELECT COUNT(schedule_id) INTO temp_job_count FROM `schedule` WHERE schedule_cell = start_cell AND schedule_date = DATE(start_time) AND deleted = 0;
SELECT cell_setup_standard INTO setup_time FROM cells WHERE cell_name = start_cell;
DROP TEMPORARY TABLE IF EXISTS rst;
CREATE TEMPORARY TABLE rst (
shot_id INT NOT NULL AUTO_INCREMENT,
shot_datetime datetime,
shot_qty INT,
PRIMARY KEY (shot_id)
);
SET temp_time = start_time;
SET temp_mold = "";
SET temp_row_count = 0;
INSERT INTO rst (shot_datetime) VALUES (temp_time);
#Loop through cursor1 recordset
OPEN cursor1;
start_loop: LOOP
FETCH cursor1 INTO temp_shot_ct, temp_shot_count, temp_shot_mold, temp_shot_cavity_count;
IF done THEN
LEAVE start_loop;
END IF;
IF temp_mold <> temp_shot_mold THEN
SET temp_time = TIMESTAMPADD(MINUTE,setup_time,temp_time); #Add standard setup time whenever the mold changes
INSERT INTO rst (shot_datetime) VALUES (temp_time);
SET temp_mold = temp_shot_mold;
END IF;
SET temp_shot_counter = 1;
REPEAT
SET temp_time = TIMESTAMPADD(SECOND,temp_shot_ct,temp_time);
INSERT INTO rst (shot_datetime,shot_qty) VALUES (temp_time,temp_shot_cavity_count);
SET temp_shot_counter = temp_shot_counter + 1;
UNTIL temp_shot_counter > temp_shot_count
END REPEAT;
END LOOP;
CLOSE cursor1;
#Return records. Will be used in ORM to loop through records on the PHP side
SELECT SUM(shot_qty) AS qty, HOUR(shot_datetime) AS shot_hour FROM rst GROUP BY HOUR(shot_datetime);
DROP TEMPORARY TABLE IF EXISTS rst;
END
I'm not the greatest at using stored procedures. This one is running very slow - it takes about 6 seconds to run. The queries individually run in milliseconds, so I was expecting this to take 100 milliseconds at most. I can't figure out what I'm doing wrong that's causing this to run so slowly. Does anyone have any ideas on how to make this run quicker? I can create a PHP script to do the same thing, but I'm trying to get better at using stored procs and functions in MySQL - and this is far less code. I welcome any and all advice.
I want to do a Migration data from one table to another.
I wrote a simple PHP script for my purposes but I wanted to do this by MySql script using user defined variables:
the PHP script looks like this:
//MIGRATION
$sql = "SELECT position FROM ts_user_config WHERE position != '' AND position NOT REGEXP '^-?[0-9]+$' GROUP BY TRIM(position) ORDER BY position";
$positions = db_loadColumn( $sql );
foreach ($positions as $key => $pos) {
$sql = "SELECT id FROM user_positions where UPPER(position) = UPPER('$pos')";
$posId = db_loadResult($sql);
if ($posId == null) {
$sql = "INSERT INTO user_positions (position, `desc`) VALUES ('$pos', '$pos')";
db_exec($sql);
$posId = db_insert_id();
}
$sql = "UPDATE ts_user_config SET position='$posId' WHERE TRIM(position)='$pos'";
db_exec($sql);
}
//---------
Could somebody be so kind and rewrite this PHP instructions to MySQL script? I tried to do this but my mySQL knowledge is very low and I couldn't done that.
Please help me if its not too much effort.
Thank you in advance.
I Have DONE IT !!!!!! :)
this is my mySQL script, I dont know if its perfect but its do what I need. Please tell me if I can make something better here. Thanks again :)
drop procedure if exists PositionMigration;
delimiter '//'
CREATE PROCEDURE PositionMigration()
BEGIN
BLOCK1: BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE pos VARCHAR(100);
DECLARE posId1 INT;
DECLARE posId2 INT;
DECLARE sql1 CURSOR FOR SELECT position FROM ts_user_config WHERE position != '' AND position NOT REGEXP '^-?[0-9]+$' GROUP BY TRIM(position) ORDER BY position;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN sql1;
read_loop: LOOP
FETCH sql1 INTO pos;
IF done THEN
LEAVE read_loop;
END IF;
BLOCK2: BEGIN
DECLARE posNotFound INT DEFAULT FALSE;
DECLARE sql2 CURSOR FOR SELECT id FROM user_positions where UPPER(position) = UPPER(pos);
DECLARE CONTINUE HANDLER FOR NOT FOUND SET posNotFound = TRUE;
OPEN sql2;
FETCH sql2 INTO posId1;
IF posNotFound THEN
INSERT INTO user_positions (position, \`desc\`) VALUES (pos, pos);
BLOCK3: BEGIN
DECLARE sql3 CURSOR FOR SELECT LAST_INSERT_ID();
OPEN sql3;
FETCH sql3 INTO posId2;
UPDATE ts_user_config SET position=posId2 WHERE TRIM(position)=pos;
CLOSE sql3;
END BLOCK3;
ELSE
UPDATE ts_user_config SET position=posId1 WHERE TRIM(position)=pos;
END IF;
CLOSE sql2;
END BLOCK2;
END LOOP;
CLOSE sql1;
END BLOCK1;
END;
//
delimiter ';'
call PositionMigration();
here is my trigger:
create trigger wyplacamy before insert on `skladki_wyplaty`
for each row
BEGIN
SELECT p.wysokosc_skladki, p.ilosc_miesiecy INTO #wysokosc_skladki, #ilosc_miesiecy
FROM skladki_aktualne p
WHERE p.pesel = NEW.pesel AND p.id_ubezpieczenia = NEW.id_ubezpieczenia;
SET NEW.wyoskosc_wyplaty = #wysokosc_skladki / #ilosc_miesiecy *75;
END
$$
This works, but the iutpput of "wyoskosc_wyplaty" is NULL, even wysokosc_skladki = 8000, and ilosc_miesiecy = 8.
You need to declare the variables before using them.
delimiter $$
create trigger wyplacamy before insert on `skladki_wyplaty`
for each row
BEGIN
DECLARE var_wysokosc_skladki INT;
DECLARE var_ilosc_miesiecy INT;
SELECT p.wysokosc_skladki, p.ilosc_miesiecy INTO var_wysokosc_skladki, var_ilosc_miesiecy
FROM skladki_aktualne p
WHERE p.pesel = NEW.pesel
AND p.id_ubezpieczenia = NEW.id_ubezpieczenia;
SET NEW.wyoskosc_wyplaty = var_wysokosc_skladki / var_ilosc_miesiecy * 75;
END
$$